Description
METSO IOP320
Technical Specifications: 8-channel analog input; 4-20mA current signal input; 16-bit ADC conversion resolution; channel photoelectric isolation; backplane 24VDC power supply; rack plug-in installation; operating temperature range 0℃ to +60℃; each channel LED status indicator; protection class IP20.
Functional Features: Collect 4-20mA analog measurement signal; hardware loop break detection; each channel independent electrical isolation; single-channel fault isolation without affecting other channels; module hardware self-diagnosis; upload measured value and fault alarm information to DCS monitoring system.
Application Scenarios: Pressure and flow instrument signal collection cabinet in thermal power plant; continuous process parameter acquisition cabinet in chemical reaction device; pulp and paper process transmitter signal cabinet; liquid level and pressure signal collection cabinet in water treatment plant.
Performance Parameters: Measurement accuracy ±0.12% full scale; low long-term zero drift; stable signal transmission under long-distance wiring; fully comply with industrial EMC electromagnetic compatibility standards; support 7×24 hours uninterrupted continuous operation.
Material Composition: Glass fiber epoxy multilayer PCB circuit board; high-precision ADC chip; photoelectric isolation components; gold-plated edge connector; metal front panel; circuit board coated with three-proof protective coating.
Structural Features: Rack plug-in modular structure; front panel equipped with LED indicators for power, running and channel fault status; rear gold-plated edge connector connects to MaxPAC rack backplane bus; analog acquisition circuit and system logic circuit are physically separated; panel fitted with mechanical locking buckle.
Working Principle: 4-20mA signal from field transmitter is transmitted to IOP320 module through supporting terminal base. The internal ADC chip converts analog current signal into digital value. Digital data is uploaded to DPU controller through backplane bus. The module continuously monitors each input loop. It identifies open circuit and over-range fault and uploads alarm information to upper DCS system.
Installation Requirements: Install in designated slot of MaxPAC I/O rack, matched with original terminal base. Use twisted shielded cable for analog signal wiring. The shield layer of cable adopts single-point grounding. Signal cables and power cables are laid in separate trunking. Cabinet protective grounding terminal must be connected reliably. Reserve enough ventilation space around module for heat dissipation.
Precautions for Use: Verify signal polarity strictly before wiring. Cut off field transmitter loop power before wiring work. Do not access high voltage signal to analog input channel. Cut off rack backplane power before module disassembly. Check tightness of wiring terminals regularly. Keep cabinet internal humidity within 20%~80% without condensation.
